[INFO] crate remote-canvas 1.0.4 is already in cache
[INFO] checking remote-canvas-1.0.4 against master#e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682 for beta-170-4
[INFO] extracting crate remote-canvas 1.0.4 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate remote-canvas 1.0.4 on toolchain e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate remote-canvas 1.0.4
[INFO] finished tweaking crates.io crate remote-canvas 1.0.4
[INFO] tweaked toml for crates.io crate remote-canvas 1.0.4 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" __CARGO_TEST_CHANNEL_OVERRIDE_DO_NOT_USE_THIS="nightly" "/workspace/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9b31f1c8c8e243587e6d564881f63f1b284952510e029271e91f147e4a73d15d
[INFO] running `Command { std: "docker" "start" "-a" "9b31f1c8c8e243587e6d564881f63f1b284952510e029271e91f147e4a73d15d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9b31f1c8c8e243587e6d564881f63f1b284952510e029271e91f147e4a73d15d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9b31f1c8c8e243587e6d564881f63f1b284952510e029271e91f147e4a73d15d", kill_on_drop: false }`
[INFO] [stdout] 9b31f1c8c8e243587e6d564881f63f1b284952510e029271e91f147e4a73d15d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1d7ab58f2d6d5de35e4295f8db965b826c227faae006e97c830db05df610eac3
[INFO] running `Command { std: "docker" "start" "-a" "1d7ab58f2d6d5de35e4295f8db965b826c227faae006e97c830db05df610eac3", kill_on_drop: false }`
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[INFO] [stdout] error[E0412]: cannot find type `Sender` in module `sync`
[INFO] [stdout]   --> src/canvas.rs:10:30
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub(crate) sender: sync::Sender<mpsc::Receiver<WSMessage>>,
[INFO] [stdout]    |                              ^^^^^^ not found in `sync`
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]    |
[INFO] [stdout] 1  + use async_std::channel::Sender;
[INFO] [stdout]    |
[INFO] [stdout] 1  + use crate::mpsc::Sender;
[INFO] [stdout]    |
[INFO] [stdout] 1  + use std::sync::mpsc::Sender;
[INFO] [stdout]    |
[INFO] [stdout] 1  + use tokio::sync::broadcast::Sender;
[INFO] [stdout]    |
[INFO] [stdout]      and 3 other candidates
[INFO] [stdout] help: if you import `Sender`, refer to it directly
[INFO] [stdout]    |
[INFO] [stdout] 10 -     pub(crate) sender: sync::Sender<mpsc::Receiver<WSMessage>>,
[INFO] [stdout] 10 +     pub(crate) sender: Sender<mpsc::Receiver<WSMessage>>,
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `Sender` in module `sync`
[INFO] [stdout]   --> src/canvas.rs:10:30
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub(crate) sender: sync::Sender<mpsc::Receiver<WSMessage>>,
[INFO] [stdout]    |                              ^^^^^^ not found in `sync`
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]    |
[INFO] [stdout] 1  + use async_std::channel::Sender;
[INFO] [stdout]    |
[INFO] [stdout] 1  + use crate::mpsc::Sender;
[INFO] [stdout]    |
[INFO] [stdout] 1  + use std::sync::mpsc::Sender;
[INFO] [stdout]    |
[INFO] [stdout] 1  + use tokio::sync::broadcast::Sender;
[INFO] [stdout]    |
[INFO] [stdout]      and 3 other candidates
[INFO] [stdout] help: if you import `Sender`, refer to it directly
[INFO] [stdout]    |
[INFO] [stdout] 10 -     pub(crate) sender: sync::Sender<mpsc::Receiver<WSMessage>>,
[INFO] [stdout] 10 +     pub(crate) sender: Sender<mpsc::Receiver<WSMessage>>,
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `channel` in module `sync`
[INFO] [stdout]    --> src/canvas.rs:267:40
[INFO] [stdout]     |
[INFO] [stdout] 267 |         let (sender, receiver) = sync::channel::<WsMessageResponse>(1);
[INFO] [stdout]     |                                        ^^^^^^^ not found in `sync`
[INFO] [stdout]     |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]     |
[INFO] [stdout] 1   + use crate::mpsc::channel;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use std::sync::mpsc::channel;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use tokio::sync::broadcast::channel;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use tokio::sync::mpsc::channel;
[INFO] [stdout]     |
[INFO] [stdout]       and 2 other candidates
[INFO] [stdout] help: if you import `channel`, refer to it directly
[INFO] [stdout]     |
[INFO] [stdout] 267 -         let (sender, receiver) = sync::channel::<WsMessageResponse>(1);
[INFO] [stdout] 267 +         let (sender, receiver) = channel::<WsMessageResponse>(1);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `Sender` in module `sync`
[INFO] [stdout]    --> src/websocket.rs:302:32
[INFO] [stdout]     |
[INFO] [stdout] 302 |     pub response: Option<sync::Sender<WsMessageResponse>>,
[INFO] [stdout]     |                                ^^^^^^ not found in `sync`
[INFO] [stdout]     |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]     |
[INFO] [stdout] 1   + use async_std::channel::Sender;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use crate::mpsc::Sender;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use std::sync::mpsc::Sender;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use tokio::sync::broadcast::Sender;
[INFO] [stdout]     |
[INFO] [stdout]       and 3 other candidates
[INFO] [stdout] help: if you import `Sender`, refer to it directly
[INFO] [stdout]     |
[INFO] [stdout] 302 -     pub response: Option<sync::Sender<WsMessageResponse>>,
[INFO] [stdout] 302 +     pub response: Option<Sender<WsMessageResponse>>,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `channel` in module `sync`
[INFO] [stdout]    --> src/canvas.rs:267:40
[INFO] [stdout]     |
[INFO] [stdout] 267 |         let (sender, receiver) = sync::channel::<WsMessageResponse>(1);
[INFO] [stdout]     |                                        ^^^^^^^ not found in `sync`
[INFO] [stdout]     |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]     |
[INFO] [stdout] 1   + use crate::mpsc::channel;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use std::sync::mpsc::channel;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use tokio::sync::broadcast::channel;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use tokio::sync::mpsc::channel;
[INFO] [stdout]     |
[INFO] [stdout]       and 2 other candidates
[INFO] [stdout] help: if you import `channel`, refer to it directly
[INFO] [stdout]     |
[INFO] [stdout] 267 -         let (sender, receiver) = sync::channel::<WsMessageResponse>(1);
[INFO] [stdout] 267 +         let (sender, receiver) = channel::<WsMessageResponse>(1);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `Receiver` in module `sync`
[INFO] [stdout]    --> src/websocket.rs:321:25
[INFO] [stdout]     |
[INFO] [stdout] 321 |     mut receiver: sync::Receiver<mpsc::Receiver<WSMessage>>,
[INFO] [stdout]     |                         ^^^^^^^^ not found in `sync`
[INFO] [stdout]     |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]     |
[INFO] [stdout] 1   + use async_std::channel::Receiver;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use core::ops::Receiver;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use crate::mpsc::Receiver;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use std::ops::Receiver;
[INFO] [stdout]     |
[INFO] [stdout]       and 5 other candidates
[INFO] [stdout] help: if you import `Receiver`, refer to it directly
[INFO] [stdout]     |
[INFO] [stdout] 321 -     mut receiver: sync::Receiver<mpsc::Receiver<WSMessage>>,
[INFO] [stdout] 321 +     mut receiver: Receiver<mpsc::Receiver<WSMessage>>,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `Sender` in module `sync`
[INFO] [stdout]    --> src/websocket.rs:327:46
[INFO] [stdout]     |
[INFO] [stdout] 327 |     let mut living_jobs: HashMap<Uuid, sync::Sender<WsMessageResponse>> = HashMap::new();
[INFO] [stdout]     |                                              ^^^^^^ not found in `sync`
[INFO] [stdout]     |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]     |
[INFO] [stdout] 1   + use async_std::channel::Sender;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use crate::mpsc::Sender;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use std::sync::mpsc::Sender;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use tokio::sync::broadcast::Sender;
[INFO] [stdout]     |
[INFO] [stdout]       and 3 other candidates
[INFO] [stdout] help: if you import `Sender`, refer to it directly
[INFO] [stdout]     |
[INFO] [stdout] 327 -     let mut living_jobs: HashMap<Uuid, sync::Sender<WsMessageResponse>> = HashMap::new();
[INFO] [stdout] 327 +     let mut living_jobs: HashMap<Uuid, Sender<WsMessageResponse>> = HashMap::new();
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `Sender` in module `sync`
[INFO] [stdout]    --> src/websocket.rs:302:32
[INFO] [stdout]     |
[INFO] [stdout] 302 |     pub response: Option<sync::Sender<WsMessageResponse>>,
[INFO] [stdout]     |                                ^^^^^^ not found in `sync`
[INFO] [stdout]     |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]     |
[INFO] [stdout] 1   + use async_std::channel::Sender;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use crate::mpsc::Sender;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use std::sync::mpsc::Sender;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use tokio::sync::broadcast::Sender;
[INFO] [stdout]     |
[INFO] [stdout]       and 3 other candidates
[INFO] [stdout] help: if you import `Sender`, refer to it directly
[INFO] [stdout]     |
[INFO] [stdout] 302 -     pub response: Option<sync::Sender<WsMessageResponse>>,
[INFO] [stdout] 302 +     pub response: Option<Sender<WsMessageResponse>>,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `Receiver` in module `sync`
[INFO] [stdout]    --> src/websocket.rs:375:21
[INFO] [stdout]     |
[INFO] [stdout] 375 |     receiver: sync::Receiver<mpsc::Receiver<WSMessage>>,
[INFO] [stdout]     |                     ^^^^^^^^ not found in `sync`
[INFO] [stdout]     |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]     |
[INFO] [stdout] 1   + use async_std::channel::Receiver;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use core::ops::Receiver;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use crate::mpsc::Receiver;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use std::ops::Receiver;
[INFO] [stdout]     |
[INFO] [stdout]       and 5 other candidates
[INFO] [stdout] help: if you import `Receiver`, refer to it directly
[INFO] [stdout]     |
[INFO] [stdout] 375 -     receiver: sync::Receiver<mpsc::Receiver<WSMessage>>,
[INFO] [stdout] 375 +     receiver: Receiver<mpsc::Receiver<WSMessage>>,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `Receiver` in module `sync`
[INFO] [stdout]    --> src/websocket.rs:321:25
[INFO] [stdout]     |
[INFO] [stdout] 321 |     mut receiver: sync::Receiver<mpsc::Receiver<WSMessage>>,
[INFO] [stdout]     |                         ^^^^^^^^ not found in `sync`
[INFO] [stdout]     |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]     |
[INFO] [stdout] 1   + use async_std::channel::Receiver;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use core::ops::Receiver;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use crate::mpsc::Receiver;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use std::ops::Receiver;
[INFO] [stdout]     |
[INFO] [stdout]       and 5 other candidates
[INFO] [stdout] help: if you import `Receiver`, refer to it directly
[INFO] [stdout]     |
[INFO] [stdout] 321 -     mut receiver: sync::Receiver<mpsc::Receiver<WSMessage>>,
[INFO] [stdout] 321 +     mut receiver: Receiver<mpsc::Receiver<WSMessage>>,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `Receiver` in module `sync`
[INFO] [stdout]    --> src/websocket.rs:389:21
[INFO] [stdout]     |
[INFO] [stdout] 389 |     receiver: sync::Receiver<mpsc::Receiver<WSMessage>>,
[INFO] [stdout]     |                     ^^^^^^^^ not found in `sync`
[INFO] [stdout]     |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]     |
[INFO] [stdout] 1   + use async_std::channel::Receiver;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use core::ops::Receiver;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use crate::mpsc::Receiver;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use std::ops::Receiver;
[INFO] [stdout]     |
[INFO] [stdout]       and 5 other candidates
[INFO] [stdout] help: if you import `Receiver`, refer to it directly
[INFO] [stdout]     |
[INFO] [stdout] 389 -     receiver: sync::Receiver<mpsc::Receiver<WSMessage>>,
[INFO] [stdout] 389 +     receiver: Receiver<mpsc::Receiver<WSMessage>>,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `Sender` in module `sync`
[INFO] [stdout]    --> src/websocket.rs:327:46
[INFO] [stdout]     |
[INFO] [stdout] 327 |     let mut living_jobs: HashMap<Uuid, sync::Sender<WsMessageResponse>> = HashMap::new();
[INFO] [stdout]     |                                              ^^^^^^ not found in `sync`
[INFO] [stdout]     |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]     |
[INFO] [stdout] 1   + use async_std::channel::Sender;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use crate::mpsc::Sender;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use std::sync::mpsc::Sender;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use tokio::sync::broadcast::Sender;
[INFO] [stdout]     |
[INFO] [stdout]       and 3 other candidates
[INFO] [stdout] help: if you import `Sender`, refer to it directly
[INFO] [stdout]     |
[INFO] [stdout] 327 -     let mut living_jobs: HashMap<Uuid, sync::Sender<WsMessageResponse>> = HashMap::new();
[INFO] [stdout] 327 +     let mut living_jobs: HashMap<Uuid, Sender<WsMessageResponse>> = HashMap::new();
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `channel` in module `sync`
[INFO] [stdout]   --> src/lib.rs:18:36
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let (sender, receiver) = sync::channel::<mpsc::Receiver<WSMessage>>(1024);
[INFO] [stdout]    |                                    ^^^^^^^ not found in `sync`
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]    |
[INFO] [stdout] 10 + use crate::mpsc::channel;
[INFO] [stdout]    |
[INFO] [stdout] 10 + use std::sync::mpsc::channel;
[INFO] [stdout]    |
[INFO] [stdout] 10 + use tokio::sync::broadcast::channel;
[INFO] [stdout]    |
[INFO] [stdout] 10 + use tokio::sync::mpsc::channel;
[INFO] [stdout]    |
[INFO] [stdout]      and 2 other candidates
[INFO] [stdout] help: if you import `channel`, refer to it directly
[INFO] [stdout]    |
[INFO] [stdout] 18 -     let (sender, receiver) = sync::channel::<mpsc::Receiver<WSMessage>>(1024);
[INFO] [stdout] 18 +     let (sender, receiver) = channel::<mpsc::Receiver<WSMessage>>(1024);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `Receiver` in module `sync`
[INFO] [stdout]    --> src/websocket.rs:375:21
[INFO] [stdout]     |
[INFO] [stdout] 375 |     receiver: sync::Receiver<mpsc::Receiver<WSMessage>>,
[INFO] [stdout]     |                     ^^^^^^^^ not found in `sync`
[INFO] [stdout]     |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]     |
[INFO] [stdout] 1   + use async_std::channel::Receiver;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use core::ops::Receiver;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use crate::mpsc::Receiver;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use std::ops::Receiver;
[INFO] [stdout]     |
[INFO] [stdout]       and 5 other candidates
[INFO] [stdout] help: if you import `Receiver`, refer to it directly
[INFO] [stdout]     |
[INFO] [stdout] 375 -     receiver: sync::Receiver<mpsc::Receiver<WSMessage>>,
[INFO] [stdout] 375 +     receiver: Receiver<mpsc::Receiver<WSMessage>>,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `Receiver` in module `sync`
[INFO] [stdout]    --> src/websocket.rs:389:21
[INFO] [stdout]     |
[INFO] [stdout] 389 |     receiver: sync::Receiver<mpsc::Receiver<WSMessage>>,
[INFO] [stdout]     |                     ^^^^^^^^ not found in `sync`
[INFO] [stdout]     |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]     |
[INFO] [stdout] 1   + use async_std::channel::Receiver;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use core::ops::Receiver;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use crate::mpsc::Receiver;
[INFO] [stdout]     |
[INFO] [stdout] 1   + use std::ops::Receiver;
[INFO] [stdout]     |
[INFO] [stdout]       and 5 other candidates
[INFO] [stdout] help: if you import `Receiver`, refer to it directly
[INFO] [stdout]     |
[INFO] [stdout] 389 -     receiver: sync::Receiver<mpsc::Receiver<WSMessage>>,
[INFO] [stdout] 389 +     receiver: Receiver<mpsc::Receiver<WSMessage>>,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `channel` in module `sync`
[INFO] [stdout]   --> src/lib.rs:18:36
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let (sender, receiver) = sync::channel::<mpsc::Receiver<WSMessage>>(1024);
[INFO] [stdout]    |                                    ^^^^^^^ not found in `sync`
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]    |
[INFO] [stdout] 10 + use crate::mpsc::channel;
[INFO] [stdout]    |
[INFO] [stdout] 10 + use std::sync::mpsc::channel;
[INFO] [stdout]    |
[INFO] [stdout] 10 + use tokio::sync::broadcast::channel;
[INFO] [stdout]    |
[INFO] [stdout] 10 + use tokio::sync::mpsc::channel;
[INFO] [stdout]    |
[INFO] [stdout]      and 2 other candidates
[INFO] [stdout] help: if you import `channel`, refer to it directly
[INFO] [stdout]    |
[INFO] [stdout] 18 -     let (sender, receiver) = sync::channel::<mpsc::Receiver<WSMessage>>(1024);
[INFO] [stdout] 18 +     let (sender, receiver) = channel::<mpsc::Receiver<WSMessage>>(1024);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 8 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0412, E0425.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0412`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `remote-canvas` (lib test) due to 9 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 8 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0412, E0425.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0412`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `remote-canvas` (lib) due to 9 previous errors
[INFO] running `Command { std: "docker" "inspect" "1d7ab58f2d6d5de35e4295f8db965b826c227faae006e97c830db05df610eac3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d7ab58f2d6d5de35e4295f8db965b826c227faae006e97c830db05df610eac3", kill_on_drop: false }`
[INFO] [stdout] 1d7ab58f2d6d5de35e4295f8db965b826c227faae006e97c830db05df610eac3
